Hardware Raytracing on Lumen can cause a crash on AMD Radeon GPUs

UE - Graphics Features - Lumen - Jul 29, 2025

Hardware Raytracing support can cause a crash on AMD Radeon GPUs when creating the RT pipeline state. ...

Clearcoat shader disappears if any asset using the Material leaves lighting

UE - Graphics Features - Aug 19, 2015

Clearcoat Shader will stop receiving lighting information if any mesh assigned the material using the shader leaves lighting. Also Reproduced in Launcher 4.9 Preview 4, Main-CL-2660934 [Image Remo ...

On Linux, FBX Import breaks content browser and RMB control in edior

UE - Platform - Linux - May 12, 2015

After importing a FBX and closing the project, upon reopening the content browser does not show any assets and click/holding RMB does not allow camera to pan around. ...

Animations on joints with ZXY Rotation Order don't work in 4.10

Tools - Dec 15, 2015

Animations on joints with ZXY Rotation Order don't work in 4.10. The attached fbx has an animation that should show the thigh_l joint rotating back and then back to default position. This bug does ...

Substance Plugin causes packaged projects on Mac to fail to open

Tools - Jun 17, 2015

If a project is packaged on the Mac while the Substance Plugin is installed, the resulting .app will fail to open. This does not generate a log. ...

C++ Event Dispatchers target pin cannot be set to actor references

UE - Gameplay - Blueprint - Nov 13, 2014

When connecting C++ created event dispatcher, the Target node will not accept reference to other actors. This is happening in 4.6 and Main but is working as intended in 4.5.1 ...

Trace from cursor sporadically returns false if camera is positioned over 1k uu from character and mouse is over a landscape

UE - LD & Modeling - Terrain - Landscape - Jun 1, 2015

Trace returns false periodically when camera is positioned above 1k units from character if the cursor is over a landscape ...

German keyboard layout does not recognize the keys ö,ü,^ in editor

Tools - May 12, 2015

ö,ü,^ keys are not recognized on keyboards with a german QWERTZ layout in editor. ...

Blueprint functions with component targets lose component target when copied/pasted

UE - Gameplay - Blueprint - Mar 17, 2015

Functions that are created with specific component targets lose their target when copied/pasted. ...

After clearing the options of a ComboBox (String) widget it will not update

UE - Editor - UI Systems - Jan 13, 2015

If a user uses clear options on a combo box (String) and then tries to add new and different data, the data that is added was the data that was removed with the clear options node. ...